Sierra Aylina McClain (born March 16, 1994) is an American actress and singer. As an actress, she was first recognized for her role as Sierra in Daddy's Little Girls (2007). She had her breakthrough as Nessa Parker in Empire (2016–2018), and is also best known for starring as Tanya Clifton in the television series Mindhunter (2019). Her film roles have included starring as Tosha in the films Honey: Rise Up and Dance (2018), and as Carina in Shrink (2009). She is currently starring as Grace Ryder in 9-1-1: Lone Star (2020–present).
As a singer, she is best known as a member of the sister brother group Thriii with her sisters.